// var num = 123 // new Number(123)
// num.a = 'aaa'
// delete num.a
  
var s = 'hello'
var n = 123
var f = true
var u = undefined
var o = null
var sy = Symbol(1)
var b = 123123123n

// console.log(typeof s)
// console.log(typeof(n))
// console.log(typeof(f))
// console.log(typeof(u))
// console.log(typeof(sy))
// console.log(typeof(b))
// console.log(typeof(o))

var obj = {}
var arr = []
var date = new Date()
console.log(typeof(obj)); // object
console.log(typeof(arr)); // object
console.log(typeof(date)); // object




